![](/img/trans.png)
[英]checkbox checked when value same with data from database-javascript
[英]Checkbox Value is reversed based on data that user enters, JavaScript needs to know when it is checked
晚上好,
我有一種情況,用戶正在選中一個框,以通過SparkJava / Java在MySQL數據庫中輸入一行數據(或更新一行數據)。 除了一個小問題,一切都按預期進行。
如果數據庫中已經存在一個值,則“復選框”應與之相反。 因此,例如...用戶第一次單擊該復選框時,會將其添加到數據庫中。 但是,如果刷新頁面,它將嘗試再次添加它而不是刪除它。
我幾乎可以確定問題出在以下幾行:
var newValue = $(this).is(':checked') ? "add" : "remove";
但是我不確定如何檢查值是否使JavaScript知道。 請注意,我已經通過HTML中的Velocity使用條件語句進行了此檢查(此功能按預期工作)。
#if ($amiibo.Collected == "Y")
<div class="star has-text-warning" id="star$amiibo.AmiiboID">
#else
<div class="star" id="star$amiibo.AmiiboID">
#end
以下是我的Javascript的完整代碼段:
$(document).ready(function(){
$( ".mine" ).change(function() {
var newValue = $(this).is(':checked') ? "add" : "remove";
var amiibo = $(this).attr('id');
var activeAmiiboID = amiibo.split('#')[1];
var activeAmiiboName = amiibo.split('#')[2];
$("#star"+activeAmiiboID).toggleClass("has-text-warning");
console.log( "Handler for .change() called with value: " + newValue );
console.log("activeAmiiboID is: "+ activeAmiiboID);
console.log("Sending request to backend");
if (newValue == 'add') {
VanillaToasts.create({
title: 'Added to Favorites',
text: activeAmiiboName + ' has been added to your Collection.',
timeout: 4000,
type: 'success',
});
}
else if (newValue == 'remove') {
VanillaToasts.create({
title: 'Removed from Favorites',
text: activeAmiiboName + ' has been removed from your Collection.',
timeout: 4000,
type: 'error',
});
}
$.ajax({
url: '/collection',
type: 'post',
data: {
mine: newValue + "Amiibo",
amiiboID: activeAmiiboID
},
success: function () {
console.log("Request completed successfully");
}
});
});
任何幫助將不勝感激。 有沒有...
A)一種使javascript知道此值的方法是根據我的速度或條件條件語句來檢查的
謝謝! 特拉維斯W.
我想我已經弄明白了。 在讓JS決定添加或刪除之前,我正在通過if語句運行新變量addRemove。 仍然歡迎其他想法! 始終開放學習。 以下是我測試過的解決方案,它正在運行:
$(document).ready(function(){
$( ".mine" ).change(function() {
var amiibo = $(this).attr('id');
var activeAmiiboID = amiibo.split('#')[1];
var activeAmiiboName = amiibo.split('#')[2]
var addRemove = document.getElementById("mine#"+activeAmiiboID+"#"+activeAmiiboName).value;
if (addRemove == 'Y') {
console.log("If: Value was "+ addRemove);
var newValue = $(this).is(':checked') ? "remove" : "add";
} else {
console.log("Else: Value was "+ addRemove);
var newValue = $(this).is(':checked') ? "add" : "remove";
}
$("#star"+activeAmiiboID).toggleClass("has-text-warning");
console.log( "Handler for .change() called with value: " + newValue );
console.log("activeAmiiboID is: "+ activeAmiiboID);
console.log("Sending request to backend");
if (newValue == 'add') {
VanillaToasts.create({
title: 'Added to Favorites',
text: activeAmiiboName + ' has been added to your Collection.',
timeout: 4000,
type: 'success',
});
}
else if (newValue == 'remove') {
VanillaToasts.create({
title: 'Removed from Favorites',
text: activeAmiiboName + ' has been removed from your Collection.',
timeout: 4000,
type: 'error',
});
}
$.ajax({
url: '/collection',
type: 'post',
data: {
mine: newValue + "Amiibo",
amiiboID: activeAmiiboID
},
success: function () {
console.log("Request completed successfully");
}
});
});
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.